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Fold a 24 cm square paper in half four times to get a small square. What is the area of the small square______ Square centimeter
Side length of small square: 24 × 14 = 6 (CM), area of small square: 6 × 6 = 36 (square cm); answer: the area of this small square is 36 square cm
The square of side length () has an area of (), () about 1 square centimeter
One centimeter, one square centimeter, nail plate of little finger
A square, its area is 25 square centimeters, its side length is ()
A. 4cm B. 5cm C. 6cm
Because 5 × 5 = 25, the side length of the square is 5cm
Square photo frame middle part side length a cm, photo frame width b cm, calculate the photo frame area?
(a+2b)^2-a^2
The perimeter of a rectangle is 24cm. If the length of the rectangle is reduced by 2cm and the width is increased by 3cm, it becomes a square. Find the area of the original rectangle
The length of the rectangle is reduced by 2cm, and the width is increased by 3cm
2 + 3 = 5 (CM)
The width is:
(24-5 × 2) △ 4 = 3.5 (CM)
Long as:
3.5 + 5 = 8.5 (CM)
the measure of area:
8.5 × 3.5 = 29.75 (cm2)
As shown in the figure, the length of a rectangle is reduced by 4cm and the width is increased by 2cm. The result is a square whose area is equal to that of the original rectangle. Find the length and width of the original rectangle
Let the length and width of the original rectangle be xcm and YCM respectively. According to the meaning of the title, we get x − 4 = y + 2, ① xy = (x − 4) (y + 2) ②. From ②, we get: xy = XY + 2x-4y-8, that is, x-2y = 4, x = 2Y + 4, substituting into ①, we get: 2Y + 4-4 = y + 2, solving y = 2, substituting y = 2 into ①, we get: x = 8, the solution of the equations is: x = 8y = 2, so the original rectangle is 8cm in length and 2cm in width
If the length of a rectangle is reduced by 4cm and the width is increased by 2cm, a square can be obtained, and its area is equal to that of the rectangle
Find the length and width of the rectangle, the process of solving the problem and the reasons for listing the equations. Thank you
Let x * y = (Y-2) * (x + 4) and x = y solve the system of equations x * y = (Y-2) * (x + 4) with length x + 4 and width Y-2, and get x = y = 4, that is, length 8cm and width 2cm
As shown in the figure, the length of a rectangle is reduced by 4cm and the width is increased by 2cm. The result is a square whose area is equal to that of the original rectangle. Find the length and width of the original rectangle
Let the length and width of the original rectangle be xcm and YCM respectively. According to the meaning of the title, we get x − 4 = y + 2, ① xy = (x − 4) (y + 2) ②. From ②, we get: xy = XY + 2x-4y-8, that is, x-2y = 4, x = 2Y + 4, substituting into ①, we get: 2Y + 4-4 = y + 2, solving y = 2, substituting y = 2 into ①, we get: x = 8, the solution of the equations is: x = 8y = 2, so the original rectangle is 8cm in length and 2cm in width
The perimeter of the big square is 96 cm longer than that of the small square, and their area is 960 square cm different
Let the side length of a small square be xcm, then the side length of a large square is (x + 96 △ 4) cm. (x + 96 △ 4) 2-x2 = 960.48x = 384, and the solution is x = 8, ‖ x + 96 △ 4 = 32. A: the side length of a large square is 32cm, and that of a small square is 8cm
How much less is the area of a square frame with a circumference of 72 cm pulled into a parallelogram frame with a height of 15 cm?
72 △ 4 = 18 (CM), 18 × 18-18 × 15, = 324-270, = 54 (cm 2), a: the area is reduced by 54 cm 2
RELATED INFORMATIONS
- 1. The perimeter of a square is 16 decimeters. If its side length is doubled, then its perimeter is 16 decimeters______ Decimeter, area is______ Square decimeter
- 2. The circumference of the bottom surface of a cylinder is 15.7 cm, and the side area is 62.8 square cm
- 3. There are two squares, one big and the other small, whose perimeter differs by 20 cm and area by 55 square cm. What is the area of a small square?
- 4. The perimeter of a square paper is 36 cm. How many small squares with an area of 1 square centimeter can fill this paper
- 5. What is the side length of a square with an area of 20 square centimeters? Answer with primary school knowledge
- 6. If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer
- 7. A square, the side length increases 1 cm, the area increases 17 cm, how much is the original square area
- 8. If one side of a square is increased by 2cm and the other side by 1cm, the area of the rectangle is 14cm2 more than that of the square, then the length of the original square is______ cm．
- 9. If one side of the rectangle is x and the area is y, y is expressed as a function of X
- 10. It's a rectangular gift box. It's 18cm long, 15cm wide and 20cm high. Label paper is pasted around it. What's the area of the label paper at least
- 11. A cuboid with a square bottom is just a square after unfolding its side. The surface area of the cuboid is The surface area of a cuboid is () times that of a bottom area
- 12. The aspect ratio of the cuboid is 3:2:2, and its surface area is 168. In the surface area of the cuboid, several sides are square, and what is the area of the square
- 13. The minimum surface area of the cube is () cm
- 14. Three cuboids, 3cm long, 2cm wide and 1cm high, are used to form a large cuboid with the smallest surface area. What is the surface area of this cuboid in square centimeter?
- 15. Use 16 square paper with 1cm side length to make a rectangle and a square. How to make the perimeter of the figure shortest
- 16. Use 20 squares with 1cm sides to form a rectangle. If the perimeter of the rectangle is the shortest, then one long side of the rectangle should be () cm
- 17. A cuboid is 3M long. After sawing it into three sections, the surface area increases by 36 square meters. The volume of the original cuboid is
- 18. After sawing a 3 m long cuboid into three sections, the surface area increases by 8 square decimeters. How many cubic decimeters is the original volume of this cuboid?
- 19. The surface area of the cuboid is reduced by () cm by sawing a 10 cm long, 8 cm wide and 8 cm high cuboid into the largest cube No direct answers,
- 20. A rectangular block of wood, 20 cm long, 15 cm wide and 8 cm high. Saw it into 4 pieces. How many square centimeters is the sum of the surface area of the four small rectangles?